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katrin2010 [14]
3 years ago
11

A scientist would like to make 450.0 mL of a 0.0200 M HCl by diluting a 7.00 M HCl solution. What volume of the 7.00 M HCl solut

ion should the scientist use?
Chemistry
1 answer:
bagirrra123 [75]3 years ago
6 0
450.0 ML because it has more solution and it would be better if the sciences users it
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At 100.0∘C, the ion product of water is 5.13×10−13. What is the concentration of hydroxide ions at this temperature? Your answer
Trava [24]

Answer: The concentration of hydroxide ions at this temperature is 7.16\times 10^{-7}

Explanation:

When an expression is formed by taking the product of concentration of ions raised to the power of their stoichiometric coefficients in the solution of a salt is known as ionic product.

The ionic product for water is written as:

K_w=[H^+][OH^-]

5.13\times 10^{-13}=[H^+][OH^-]

As [H^+]=[OH^-]

5.13\times 10^{-13}=x^2

x=7.16\times 10^{-7}

The concentration of hydroxide ions at this temperature is 7.16\times 10^{-7}

6 0
2 years ago
If two atoms of sodium (Na) combine with one molecule of chlorine (cI2), which of the following could be the product?
enyata [817]
2Na + Cl2 ----> 2NaCl 
  .: product have to be " 2NaCl "  
 
7 0
3 years ago
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Korolek [52]

Answer: Option (c) is the correct answer.

Explanation:

When current passes through a wire then a magnetic field is formed. Therefore, when two wires carry current in the same direction then both the wires with have respective magnetic fields in the same direction and their total magnetic field will be large.

But when current between two wires flow in opposite direction then the magnetic field produced will also be in opposite direction. Therefore, both the magnetic fields cancel each other out. Thus, total magnetic field will be small.

As a result, wires which carry current in the opposite direction repel each other.


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3 years ago
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Which of the following mixtures could not be separated by filtration
____ [38]
The answer to this question would be Salty water(i think its the most likely to go through) because salt water is a homogeneous mixture so it would go through.
4 0
3 years ago
Sort these elements into pairs that would most likely exhibit similar chemical properties. It doesn't matter which pair goes in
nikklg [1K]

<em>Answer:</em>

  •                           Na = Rb
  •                           Ne = Kr
  •                           O = Se

<em>Explanation:</em>

  • According to modern periodic table, the elements present in same group have same chemical properties , because they same valence shell electrons.

<em>Na and Rb:</em>

  • As these both elements are present in group one, so these are called Alkali metals. Almost all alkali metal have same chemical properties.

<em>Ne and Kr:</em>

  • Both these elements are present in group 18, called as noble gases.
  • They have same chemical properties like both are stable and are inert.

<em>O and Se:</em>

  • Both elements are present in group 16.
  • Both have same chemical properties.
  • Both have same valence shell electrons.
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